Computing the Full Earth System at 1km Resolution

Explore a groundbreaking conference talk presenting the first-ever global simulation of the complete Earth system at 1.25 km grid spacing, achieving unprecedented time compression with an extraordinary number of degrees of freedom. Learn how researchers successfully modeled the flow of energy, water, and carbon through key Earth system components including atmosphere, ocean, and land using massive computational resources of 8192 GPUs on Alps and 20480 GPUs on JUPITER supercomputers. Discover the innovative heterogeneous setup that carefully balances Earth's components by utilizing both Grace CPUs and Hopper GPUs, along with optimized acceleration techniques in ICON's codebase. Understand how separation of concerns reduced code complexity by half while simultaneously increasing performance and portability. Examine the remarkable achievement of 145.7 simulated days per day time compression that enables comprehensive long-term studies with full Earth system interactions, even outperforming previous atmosphere-only simulations at similar resolution. Gain insights into cutting-edge climate modeling techniques, high-performance computing applications, and the technical challenges overcome in creating this landmark 1km resolution Earth system simulation.